Air-cooled water chillers
Compressors
OF THE MAIN COMPONENTS
The CIAT electronic control module performs the following main functions: Control of chilled water temperature Control of water temperature based on the outdoor temperature (water law) Control for low temperature energy storage Second setpoint management Complete management of compressors with start-up sequence, timer and runtime balancing Self-adjusting and proactive functions with adjustment of settings on drift control Continuous capacity-reduction system for compressors according to cooling requirements Management of compressor short-cycle protection Management of the machine operation limit according to outdoor temperature Operating status and fault status diagnostics Management of a fault memory allowing a log of the last 20 incidents to be accessed, with an operating reading taken when the fault occurs Master/slave management of the two machines in parallel with runtime balancing and automatic changeover if a fault occurs on one machine Machine timer programming Display and access to the operating parameters via a multilingual LCD screen with 4 lines of 24 characters
Double-screw-type accessible hermetic Optimised rotor profile guarantees high performance Integrated electric motor with star-delta start Motor features integral electronic protection Direction of rotation and phase balance control Integrated pressure relief valve Discharge temperature control Pressurised lubrication control Integrated 3-way oil separator Crankcase heater Fine suction filter Discharge valve Slide-control continuous power control Mounted on anti-vibration dampers Dry expansion shell and tube-type High performance copper tube bundle Steel body Anti-corrosion baffles Cellular foam thermal insulation with UV-resistant polyurethane film
Evaporator
Air-cooled condenser
All-aluminium micro-channel coils Direct drive propeller fans Rotation speed: 910 or 720 rpm Three-phase electric motors, IP 54 Dehumidifier filters with rechargeable cartridges Hygroscopic sight glasses Solenoid valves on liquid refrigerant lines Electronic expansion valves HP/LP pressure transmitters High and low pressure safety valves Chilled water control sensor (flow and return) Outdoor temperature sensor Evaporator frost protection sensor Compressor discharge sensor Evaporator water circulation controller
Remote control
Cooling accessories
Control and safety devices
Electrics box
IP 44 400V 3ph 50Hz power supply + Earth (-10%/+10%) Wire numbering and electrical component marking Main safety switch (fused isolator) with external handle Control circuit transformer Compressor motor contactors Fan motor switches Fused motor compressors Fan motor protection Main earth connection Phase controller (reversal, loss, asymmetry, over and under voltage)
XTRACONNECT2 is equipped as standard with an RS485 serial port offering a range of remote management, monitoring and diagnostic options via the communication bus. Several contacts are available as standard, enabling the POWERCIAT2 to be controlled remotely by cabled link: Automatic operation control: when this contact is open, the machine stops Setpoint 1/setpoint 2 selector: when this contact is closed, a second cooling setpoint is activated (energy storage mode, for example) Setpoint adjustable via 4-20 mA signal: this input is used to adjust the setpoint in COOLING mode Compressor load shedding: closing the contact or contacts concerned allows the power or cooling consumption of the machine to be limited by stopping one or more compressors Water pump 1 and 2 control: these outputs control the switches for one or more water pumps Fault reporting: this contact indicates the presence of a major fault which has caused one or both cooling circuits to stop
Energy meter (optional)
XTRACONNECT2 electronic control module